Description
GFEVF/750 High Speed Semiconductor Fuse: 35A-800A 700V/750V Ultimate Circuit Protection
Product Overview
The GFEVF/750 high speed semiconductor fuse is a professional high-voltage, high-current circuit protection component specially developed for new energy, power electronics and industrial high-power scenarios, supporting dual rated voltages of 700V and 750V, with a full current range covering 35A to 800A. Adopting cutting-edge aR semiconductor partial-range protection technology, this fuse achieves millisecond-level ultra-fast fusing speed, powerful current-limiting performance and ultra-high breaking capacity, which can instantly cut off short-circuit and overcurrent faults, effectively protecting sensitive power semiconductor devices, high-voltage power systems and core equipment from irreversible damage.
Featuring a high-strength insulated ceramic shell, high-purity silver melt element and high-temperature quartz sand filling structure, the GFEVF/750 series fuse has excellent heat resistance, anti-vibration performance and insulation stability, complying with strict international IEC 60269, UL 248 standards, as well as RoHS and REACH environmental protection directives. It is a high-reliability protection solution tailored for high-voltage DC/AC systems, widely used in electric vehicles, energy storage, power semiconductor equipment and other high-end fields.
Core Technical Parameters
| Parameter | Detailed Specification |
|---|---|
| Model | GFEVF/750 |
| Rated Voltage | 700V DC/AC, 750V DC/AC |
| Rated Current | 35A, 40A, 50A, 63A, 80A, 100A, 125A, 160A, 200A, 250A, 315A, 350A, 400A, 500A, 630A, 800A |
| Protection Class | aR (Semiconductor Partial-Range Protection) |
| Breaking Capacity | Max 50kA @700V/750V |
| Fusing Response Time | Millisecond-level, ≤2ms |
| Operating Temperature Range | -40℃ to 85℃ |
| Installation Method | Bolt-mounted fixed installation |
| Applicable Altitude | ≤4500m |
| Compliance Standards | IEC 60269-1, IEC 60269-4, UL 248.1, UL 248.13, RoHS, REACH |
Key Performance Features
1. Ultra-Fast Fusing & Precision Current Limiting
As a professional high speed semiconductor fuse, the GFEVF/750 adopts a precision etched silver melt structure, with an extremely low I²t value, realizing millisecond-level fusing response. It can quickly limit the peak value of fault current before it impacts sensitive components, perfectly matching the protection requirements of IGBT, MOSFET, diode, thyristor and other power semiconductor devices, solving the pain point of slow fusing of ordinary fuses that cannot protect precision electronic components.
2. Dual Voltage Compatibility & Wide Current Coverage
This fuse supports dual voltage operation of 700V and 750V, adapting to the diversified high-voltage system requirements of new energy vehicles, energy storage stations and industrial equipment. The 35A-800A full range of current specifications covers low-power control circuits to high-power main circuits, realizing one-stop protection for different power modules, eliminating the trouble of model selection for multi-specification fuses.
3. High Breaking Capacity & Safe Operation
With a maximum breaking capacity of 50kA under 700V/750V voltage, the GFEVF/750 can safely and completely disconnect large short-circuit currents, without electric arc leakage, explosion or fire risks. The ceramic shell and sealed filling structure effectively isolate electric arcs, ensuring the safety of the entire circuit system even under extreme fault conditions, and meeting the high safety standards of automotive and industrial scenarios.
4. Extreme Environmental Adaptability
Adopting automotive-grade manufacturing technology, this fuse can operate stably in a wide temperature range of -40℃ to 85℃, withstand strong vibration and impact during vehicle operation and industrial equipment operation, and resist oxidation and corrosion. It has excellent long-term cycle stability, no performance attenuation after long-term use, and ensures the reliability of the protection system in harsh environments.
5. Low Power Loss & High Energy Efficiency
The high-purity silver melt and optimized contact design minimize the contact resistance of the fuse, with extremely low power loss during normal operation, reducing heat generation and energy consumption of the entire circuit. This design not only improves the energy utilization efficiency of the equipment, but also extends the service life of the fuse and surrounding components, reducing maintenance and replacement costs.
Main Application Scenarios
- New Energy Vehicle Power Systems: High-voltage main circuit protection, motor controller protection, battery management system (BMS) protection, high-voltage distribution box and on-board charger protection for pure electric vehicles and hybrid vehicles;
- Power Semiconductor Equipment: Overcurrent and short-circuit protection for frequency converters, inverters, rectifiers, welding machines, UPS power supplies and high-power industrial power supplies;
- Energy Storage Systems: Circuit protection for photovoltaic energy storage battery packs, wind power energy storage converters, large-scale energy storage stations and energy storage power conversion systems;
- New Energy Charging Equipment: DC fast charging piles, charging stations and high-power charging modules protection;
- Industrial & Rail Transit Fields: Rail transit vehicle electrical systems, marine high-voltage electrical equipment, industrial automation equipment and other high-voltage high-power circuits.
Product Advantages Compared with Conventional Fuses
Different from ordinary low-voltage fuses and slow-acting fuses, the GFEVF/750 high speed semiconductor fuse is specially designed for high-voltage and high-power scenarios. Ordinary fuses have slow fusing speed, low breaking capacity and poor current-limiting effect, which cannot meet the protection needs of sensitive semiconductor components and high-voltage systems. The GFEVF/750 has ultra-fast fusing speed, dual voltage adaptation, wide current range and high safety performance, and is the preferred protection component for high-end power systems, with irreplaceable technical advantages.
Installation and Maintenance Notes
- Install the fuse according to the specified installation torque to ensure tight contact and avoid poor contact caused by loose bolts, which may lead to overheating and damage;
- Strictly prohibit installing, disassembling or replacing the fuse with load to prevent electric shock and short-circuit accidents;
- When replacing the blown fuse, be sure to select the same model, current and voltage specification of GFEVF/750 fuse, and do not mix different specifications;
- Regularly check the appearance of the fuse for cracks, deformation and discoloration. If there is any damage, replace it immediately;
- For use in areas with altitude higher than 4500m, derating use is required, and consult technical personnel for parameter confirmation.
Conclusion
The GFEVF/750 35A-800A 700V/750V high speed semiconductor fuse is a high-performance, high-safety and high-reliability circuit protection product tailored for modern high-voltage power systems. With ultra-fast fusing, dual voltage adaptation, wide current coverage and strict international certification, it provides comprehensive and reliable protection for electric vehicles, energy storage, power semiconductor and other core fields. Whether for equipment manufacturers, engineering designers or maintenance personnel, it is the optimal choice to solve high-voltage high-power circuit overcurrent protection problems, ensuring the stable and safe operation of the entire system.
GFEVF/750 35A-800A 700V 750V High Speed Semiconductor Fuse
1. Dimensions (mm)
| S. | Amps | A±1.5 | B±1 | C±1 | D±1.5 | E±0.5 | F±0.5 | H±0.5 | G±0.5 |
|---|---|---|---|---|---|---|---|---|---|
| 20R | 35-60A | 111.00 | 20.00 | 70.00 | 90.50 | 8.50 | 15.00 | 3.00 | 13.0 |
| 26R | 70-150A | 114.00 | 26.00 | 66.00 | 90.00 | 8.50 | 20.00 | 3.00 | 12.0 |
2. Description
- Design For Dc Applications
- Excellent Dc Performance
- Low arc voltage and low energy let-through (I²t)
- Superior cycling capability
- Low Watt Losses
3. Standards / Approvals
- Refer To UL248.13 or IEC60269.4
- Approvals: CE
- RoHS Compliant
4. Features & Benefits
- Higher voltage rating provides overall system efficiency.
- Up to ten times faster opening under high fault current conditions.
- Can be applied in parallel to realize greater ampacity.
- Excellent power of resisting voltaic impingement.
- Excellent resistance to mechanical vibration and impact.
5. Fuse Ratings
| Rated Current | Catalog no. | Melting A²s (@50kA/750Vdc) |
Clearing A²s (@50kA/750Vdc) |
Power Loss W | ROHS |
|---|---|---|---|---|---|
| 20 mm diameter case | |||||
| 35A | GFEV750-35A-20R | 45 | 205 | 14 | ● |
| 40A | GFEV750-40A-20R | 82 | 360 | 15 | ● |
| 50A | GFEV750-50A-20R | 192 | 735 | 19 | ● |
| 60A | GFEV750-60A-20R | 290 | 1130 | 20 | ● |
| 26 mm diameter case | |||||
| 70A | GFEV750-70A-26R | 370 | 2100 | 22 | ● |
| 80A | GFEV750-80A-26R | 410 | 2520 | 25 | ● |
| 90A | GFEV750-90A-26R | 560 | 3040 | 29 | ● |
| 100A | GFEV750-100A-26R | 720 | 4500 | 32 | ● |
| 125A | GFEV750-125A-26R | 1850 | 9075 | 35 | ● |
| 150A | GFEV750-150A-26R | 2050 | 12375 | 42 | ● |
| 38 mm diameter case | |||||
| 125A | GFEV750-125A-38R | 1720 | 8250 | 32 | ● |
| 150A | GFEV750-150A-38R | 1850 | 11250 | 40 | ● |
| 175A | GFEV750-175A-38R | 4326 | 17535 | 45 | ● |
| 200A | GFEV750-200A-38R | 5665 | 22966 | 48 | ● |
| 225A | GFEV750-225A-38R | 8180 | 33365 | 58 | ● |
| 250A | GFEV750-250A-38R | 11301 | 45176 | 67 | ● |
| 300A | GFEV750-300A-38R | 18491 | 75683 | 83 | ● |
| 350A | GFEV750-350A-38R | 24899 | 100733 | 98 | ● |
| 400A | GFEV750-400A-38R | 32659 | 131000 | 115 | ● |
| 51 mm diameter case | |||||
| 225A | GFEV750-225A-51R | 8020 | 32330 | 52 | ● |
| 250A | GFEV750-250A-51R | 10815 | 43775 | 60 | ● |
| 275A | GFEV750-275A-51R | 14100 | 52390 | 70 | ● |
| 300A | GFEV750-300A-51R | 18128 | 73336 | 75 | ● |
| 350A | GFEV750-350A-51R | 24411 | 88468 | 88 | ● |
| 400A | GFEV750-400A-51R | 31930 | 128750 | 105 | ● |
| 450A | GFEV750-450A-51R | 37492 | 141110 | 120 | ● |
| 500A | GFEV750-500A-51R | 46586 | 175100 | 135 | ● |
| 600A | GFEV750-600A-51R | 53045 | 199266 | 142 | ● |
| 650A | GFEV750-650A-51R | 68701 | 257500 | 150 | ● |
| 700A | GFEV750-700A-51R | 76930 | 285600 | 160 | ● |
| 750A | GFEV750-750A-51R | 76500 | 347600 | 170 | ● |
| 800A | GFEV750-800A-51R | 93560 | 415000 | 205 | ● |